Business Details
44 Years
experience
Expert Double Glazing in Surrey, Kent & London
Thermguard FJ Nash Double Glazing has been serving Surrey, Kent and South London since 1982 as a family-run double glazing specialist. Our FENSA registered company combines 40 years of industry expertise with a commitment to delivering high-quality installations across windows, doors and conservatories. We operate using premium materials from recognised brands while maintaining a personalized service approach that addresses each customer's unique needs. Our team of directors and installers provide both technical proficiency and dedicated support throughout every project.From concept to completion, we ensure compliance with industry standards while focusing on energy efficiency, security and noise reduction benefits for homeowners. This enduring reputation has allowed us to build relationships across the communities we serve, evidenced through positive customer testimonials from completed projects. Transparency in our operations and clear communication remain central to our business philosophy, ensuring clients receive tailored solutions that match their requirements and budget.
Services
Double Glazed Windows
Composite Doors
Bi-Fold Doors
Conservatories
Porches
Secondary Glazing
Replacement Units
Details
- Year established: 1982
Highlights and features
- Family-owned business operating since 1982
- FENSA registered installation standards
- Personalised service from experienced team
- 40 years of combined industry expertise
- Positive customer testimonials from completed projects
Associations and certifications
- FENSA
What people say
Great product, service and price
Absolutely chuffed
Fantastic job
5* for sure
Wouldn't hesitate to recommend
Services
Double Glazed Windows
Our double glazed windows provide significant energy savings through advanced thermal insulation. Designed to reduce heat loss by up to 70%, these windows also enhance security with multi-point locking systems while maintaining optimal noise reduction levels. Each installation meets FENSA standards for quality and compliance.
Composite Doors
Durable composite doors combine modern security features with premium aesthetics. Reinforced with multi-layer construction, our doors offer excellent thermal efficiency and lasting performance. Available in various styles and colours, they provide an affordable upgrade that maintains property value through long-term durability.
Conservatories
Custom-built conservatories extend living spaces with year-round usability. Incorporating energy-efficient glazing and thermally broken frames, these structures maintain comfortable temperatures throughout seasons. Our designs balance natural light maximisation with practical considerations like solar gain management and weather resistance.
Bi-Fold Doors
Contemporary bi-fold doors create seamless transitions between indoor and outdoor spaces. Engineered with high-performance seals and reinforced frames, they offer excellent thermal efficiency alongside smooth operation. Available in multiple configurations to suit various architectural styles and property dimensions.
Secondary Glazing
Cost-effective secondary glazing improves thermal and acoustic performance without replacing existing windows. Installed internally, these panels reduce heat loss by up to 60% while minimising noise transmission. Ideal for listed buildings and conservation areas where primary window replacement isn't permitted.
People
Steve Nash
Director / Fitter
With over 35 years in the glazing industry, Steve combines technical expertise with project management. He oversees installations ensuring compliance with FENSA standards while maintaining direct client communication throughout the process.
James Nash
Director / Fitter
Bringing hands-on installation experience to daily operations, James coordinates field teams while personally undertaking complex fitting tasks. His practical knowledge ensures technical specifications align with customer expectations during every project.
Marie Nash
Director / Office Manager
Managing business operations since 1998, Marie coordinates customer inquiries, scheduling and administrative functions. Her oversight ensures consistent service quality and effective communication between clients and installation teams.
Questions
What areas do you cover?
We serve Surrey, Kent and South London including Norbury, Crystal Palace and surrounding areas.
Are your installations FENSA registered?
Yes, all our glazing installations meet FENSA compliance with certified documentation provided.
Do you offer door replacement services?
We specialise in composite doors, bi-fold doors and replacement door installations with security enhancements.
How long has your company operated?
Thermguard F J Nash Double Glazing has been serving customers since 1982 with 40+ years of combined experience.
Can you install conservatories?
Yes, we design and install custom conservatories using energy-efficient materials to create functional living spaces.
Do you provide emergency repair services?
While we don't operate 24/7, we prioritise urgent double glazing repairs for broken units or security compromises.
Reviews (2)
Lorraine Agnew
Feb 27, 2018
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Great product, service and price. Really pleased with job which ran very smoothly given the task at hand. Nothing was too much trouble for this decent family business, for which our thanks. Wouldn't hesitate to recommend.
Mark Tylee
Nov 18, 2016
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Fantastic job, very well priced and wouldn't hesitate to recommend to others. Very professional company 5* for sure
